sparc64: Force the execute bit in OpenFirmware's translation entries.

[pandora-kernel.git] / arch / sparc / mm / init_64.c

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 3fd8e18..8e073d8 100644 (file)
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -511,6 +511,11 @@ static void __init read_obp_translations(void)
                for (i = 0; i < prom_trans_ents; i++)
                        prom_trans[i].data &= ~0x0003fe0000000000UL;
        }
+
+       /* Force execute bit on.  */
+       for (i = 0; i < prom_trans_ents; i++)
+               prom_trans[i].data |= (tlb_type == hypervisor ?
+                                      _PAGE_EXEC_4V : _PAGE_EXEC_4U);
 }
 
 static void __init hypervisor_tlb_lock(unsigned long vaddr,
@@ -1597,6 +1602,44 @@ static void __init tsb_phys_patch(void)
 static struct hv_tsb_descr ktsb_descr[NUM_KTSB_DESCR];
 extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
 
+static void patch_one_ktsb_phys(unsigned int *start, unsigned int *end, unsigned long pa)
+{
+       pa >>= KTSB_PHYS_SHIFT;
+
+       while (start < end) {
+               unsigned int *ia = (unsigned int *)(unsigned long)*start;
+
+               ia[0] = (ia[0] & ~0x3fffff) | (pa >> 10);
+               __asm__ __volatile__("flush     %0" : : "r" (ia));
+
+               ia[1] = (ia[1] & ~0x3ff) | (pa & 0x3ff);
+               __asm__ __volatile__("flush     %0" : : "r" (ia + 1));
+
+               start++;
+       }
+}
+
+static void ktsb_phys_patch(void)
+{
+       extern unsigned int __swapper_tsb_phys_patch;
+       extern unsigned int __swapper_tsb_phys_patch_end;
+       unsigned long ktsb_pa;
+
+       ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE);
+       patch_one_ktsb_phys(&__swapper_tsb_phys_patch,
+                           &__swapper_tsb_phys_patch_end, ktsb_pa);
+#ifndef CONFIG_DEBUG_PAGEALLOC
+       {
+       extern unsigned int __swapper_4m_tsb_phys_patch;
+       extern unsigned int __swapper_4m_tsb_phys_patch_end;
+       ktsb_pa = (kern_base +
+                  ((unsigned long)&swapper_4m_tsb[0] - KERNBASE));
+       patch_one_ktsb_phys(&__swapper_4m_tsb_phys_patch,
+                           &__swapper_4m_tsb_phys_patch_end, ktsb_pa);
+       }
+#endif
+}
+
 static void __init sun4v_ktsb_init(void)
 {
        unsigned long ktsb_pa;
@@ -1716,8 +1759,10 @@ void __init paging_init(void)
                sun4u_pgprot_init();
 
        if (tlb_type == cheetah_plus ||
-           tlb_type == hypervisor)
+           tlb_type == hypervisor) {
                tsb_phys_patch();
+               ktsb_phys_patch();
+       }
 
        if (tlb_type == hypervisor) {
                sun4v_patch_tlb_handlers();